PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-17:13:00
G02     221.7          63.7               15.6 +/-    1.34      17.2 +/-    1.34  0.040 / 0.060
G06     47.5           69.1               13.4 +/-    0.58      14.3 +/-    0.58  0.030 / 0.050
G12     320.6          42.3               11.8 +/-    0.90      16.5 +/-    0.90  0.060 / 0.080
G17     64.3           26.2               10.4 +/-    2.14      19.8 +/-    2.14  0.050 / 0.080
G19     48.7           43.5               13.6 +/-    1.73      18.7 +/-    1.73  0.030 / 0.020
G24     259.7          39.8               14.5 +/-    2.67      21.2 +/-    2.67  0.030 / 0.020